Telecom Handover Resource Management via Target Node Coordination
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Solution Overview
Problem
In telecommunications systems, handover procedures can become inefficient and resource-intensive due to uncontrolled handovers, where user equipment (UE) may attach to unintended access nodes, leading to prolonged processes, wasted bandwidth, and reduced network efficiency, especially when timers for resource release are not synchronized.
Innovation Solution
Implementing a method where the first access node prepares a group of target access nodes for handover, and upon successful attachment by the UE to one of these nodes, the new access node sends a 'handover complete' message to the first access node, which then instructs other target nodes to release reserved resources, ensuring controlled and timely resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the serving access node prepares multiple target access nodes for handover and reserves resources at each target node, then the handover reliability is improved, but the network resource consumption increases
Solution Approach 1:
The serving access node performs preliminary preparation by installing UE context information and reserving resources at multiple potential target access nodes before handover occurs. This advance preparation ensures that when handover is needed, the UE can quickly attach to a pre-prepared target node, improving handover reliability while managing resource consumption through controlled reservation.
Solution Approach 2:
The system dynamically changes the state of resources at target access nodes between 'reserved' and 'released' based on whether the UE actually attaches to them. By monitoring attachment outcomes and adjusting resource allocation parameters accordingly, the system maintains high handover reliability while minimizing unnecessary resource consumption at nodes that are not selected for handover.
2Productivity
If the target access node releases reserved resources when the UE does not attach, then the network resource efficiency is improved, but the handover procedure time increases
Solution Approach 1:
The target access node receives feedback from the UE about whether attachment was successful. Based on this feedback, the node determines whether to release reserved resources. This feedback mechanism allows the system to efficiently release resources when handover fails while maintaining resource availability when handover succeeds, optimizing both resource efficiency and procedure timing.
Solution Approach 2:
The system releases resources partially - only at those target access nodes where the UE did not successfully attach, while maintaining resources at the selected target node. This partial release approach prevents excessive resource release that would extend handover time, while still improving overall network resource efficiency by releasing unused reservations.
3Measurement precision
If the serving access node waits for confirmation from the target access node before releasing resources at other target nodes, then the resource release accuracy is improved, but the system complexity increases
Solution Approach 1:
The serving access node acts as an intermediary that coordinates resource release across multiple target access nodes. It receives attachment confirmation from the selected target node and then systematically notifies other target nodes to release their reserved resources. This intermediary role ensures accurate resource release without requiring direct complex communication between all target nodes, managing system complexity through centralized coordination.
Data Source
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AI summary
Apparatus and method for an efficient handover of at least one user equipment from a first access node to at least one further access node of a plurality of access nodes in a telecommunications system, said method comprising the steps of: said first access node, upon reception of a handover request from said user equipment, preparing a group of further access nodes of said plurality as possible target access nodes, upon attachment of said user equipment to said one further access node, said one further access node transmitting a message to said first access node, and upon reception of said message by said first access node, said first access node transmitting a further message to said possible target access nodes.